In the legacy ringbuffer submission, we still had an open-coded version
of intel_engine_stop_cs() with one addition verification step. Transfer
that verification to intel_engine_stop_cs() itself, and call it.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/gt/intel_engine_cs.c | 15 +++++++++--
.../gpu/drm/i915/gt/intel_ring_submission.c | 25 +------------------
2 files changed, 14 insertions(+), 26 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index 1847d3c2ea99..58c900a12c13 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -1048,8 +1048,19 @@ int intel_engine_stop_cs(struct intel_engine_cs *engine)
ENGINE_TRACE(engine, "\n");
if (__intel_engine_stop_cs(engine, 1000, stop_timeout(engine))) {
- ENGINE_TRACE(engine, "timed out on STOP_RING -> IDLE\n");
- err = -ETIMEDOUT;
+ ENGINE_TRACE(engine,
+ "timed out on STOP_RING -> IDLE; HEAD:%04x,
TAIL:%04x\n",
+ ENGINE_READ_FW(engine, RING_HEAD) & HEAD_ADDR,
+ ENGINE_READ_FW(engine, RING_TAIL) & TAIL_ADDR);
+
+ /*
+ * Sometimes we observe that the idle flag is not
+ * set even though the ring is empty. So double
+ * check before giving up.
+ */
+ if ((ENGINE_READ_FW(engine, RING_HEAD) & HEAD_ADDR) !=
+ (ENGINE_READ_FW(engine, RING_TAIL) & TAIL_ADDR))
+ err = -ETIMEDOUT;
}
return err;
diff --git a/drivers/gpu/drm/i915/gt/intel_ring_submission.c
b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
index 4ea741f488a8..90b483b4ae5d 100644
--- a/drivers/gpu/drm/i915/gt/intel_ring_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
@@ -158,30 +158,7 @@ static void ring_setup_status_page(struct intel_engine_cs
*engine)
static bool stop_ring(struct intel_engine_cs *engine)
{
- struct drm_i915_private *dev_priv = engine->i915;
-
- if (INTEL_GEN(dev_priv) > 2) {
- ENGINE_WRITE(engine,
- RING_MI_MODE, _MASKED_BIT_ENABLE(STOP_RING));
- if (intel_wait_for_register(engine->uncore,
- RING_MI_MODE(engine->mmio_base),
- MODE_IDLE,
- MODE_IDLE,
- 1000)) {
- drm_err(&dev_priv->drm,
- "%s : timed out trying to stop ring\n",
- engine->name);
-
- /*
- * Sometimes we observe that the idle flag is not
- * set even though the ring is empty. So double
- * check before giving up.
- */
- if (ENGINE_READ(engine, RING_HEAD) !=
- ENGINE_READ(engine, RING_TAIL))
- return false;
- }
- }
+ intel_engine_stop_cs(engine);
ENGINE_WRITE(engine, RING_HEAD, ENGINE_READ(engine, RING_TAIL));
--
2.20.1
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